Fastening device



H. R. SIEGLEH.

FASTENING DEVICE. APPLlcTIoN min SEPT. 19. 1913;

Patented Feb. 15 1921.

HUGO R. SIEGLER, OF CHICAGO, ILINOIS.

FASTENING- DEVICE.

Specificationof1.et'cex's1atent.` Patented Feb. 15|, 1921.

Application led September 19, 1913. Serial No. 790,650. f

' T o aZZ whom it may concern.'

Be it known that I, HUGO R. SiEGLEn, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful-Im rovements in Fastening Devices,

-of which t e follow-ing is a specification.

This invention relates to a fastening device for securing the corners ormeeting ends of wood structures and is especially adapted forpermanently securing together the parts' forming a miter-joint; and hasfor its object to provide a'device of this kind possessing certain newand novel features. v

Figure 1 is a side elevation of a fastening device yembodying theimproved features. j

Fig. 2 is a vertical transverse section on line2, F ig.4:. y

Fig. `3 is a similar View showing the fastening device in place.v

Fig. 4 is a plan of two corner pieces pre'- pared to be joined together.

Fig. 5 shows the fastener inserted andv the joint closed.

Fig. 6 is a vertical longitudinal section of 'the fastener on line 6,Fig. 1.

Fig. 7 is a horizontal transverse section on line 7, Fig. 1.

A represents a fastener which embodies the improvement and comprises aflat web or body partl 8 and the double fianged edges 9 and 10projecting at right angles from the web-part on each side, as best shownin Fig. 7. These flanges present a straight surface on outer side 11 andare beveled on the inlnerside,asrat 12, to a sharp knife edge 13.

The fastener is made slightly wedge-shape, that is, gradually wideningfrom the head or driving end 14: to the driven end 15, as best shown inFigs. 1 and 3. The wider end of the fastener is inserted in the workfirst and as the operation of driving progresses, the wedge shape andthe beveled flange surfaces 12 have the effect -of drawing the workparts firmly together into a close fitting joint and entirely dispensingwith the use of glue or other objectionable means. The. joint made withthe fastener 1s stronger than dovetailing and renders the use of anexpensive dovetailing machine un-` necessary in factory work.

The practical use of the nail is very simple andthe operation easilyunderstood, so that the work can be done by inexperienced personswithout the necessity for employing skilled labor.

Preparatory to inserting the fastener, make a saw cut down the face ofveach side of the joint approximately five sixteenths of an inch in depthforming a kerf or groove 16, then drive thefastener into place. The sawcuts or kerfs will be about the same depths in the joining members 17and '18 of the work so that one half of the fastener is let into eachmember or part, as shown in Figs. 3 and 5. 'The fibers of the wood willadhere closely to the flanged edges of the fastener and leave noopenings or space.

The fastener may be inserted so as to be 4 embedded and the surface ofthe joint fnished so as to leave no showing as to the means employed insecuring the parts together. The work can vbe completed at once without'having to wait for a setting, as is the case when glue or other adhesivecomposition is used.

Having thus described my invention, whatI claim is v A metal nail of-I-shaped cross-section comprising a relatively thick wedge shaped webcut from sheet metal with straight top and bottom 'edges and relativelyvery thin smooth sharp cutting upset flanges, whereby said web may liein a saw kerf in adjoining pieces of wood while the opposing flanges byreason of'their knife edge thin ness may opposingly cut their way intothe wood and remain ylodged therein.

In testimony whereof I aiiiX my signature in presence of two Witnesses.

HUGO R. SIEGLER.

Witnesses: v

A. H. STANTON, G. E. Ommen.-

